MANUFACTURE OF GALVANNEALED STEEL SHEET

PURPOSE:To securely execute alloying treatment by previously applying Fe-C-S composite plating to the surface of a steel sheet, then applying galvanizing and thereafter executing heating and alloying treatment. CONSTITUTION:The surface of a steel sheet contg. 0.02 to 0.05% P and/or 0.03 to 3% Si and...

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Bibliographische Detailangaben
Hauptverfasser:	ITOMI MAKOTO, SUZUKI SHINICHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PURPOSE:To securely execute alloying treatment by previously applying Fe-C-S composite plating to the surface of a steel sheet, then applying galvanizing and thereafter executing heating and alloying treatment. CONSTITUTION:The surface of a steel sheet contg. 0.02 to 0.05% P and/or 0.03 to 3% Si and/or 0.1 to 3% Mn is applied with Fe-C-S composite plating and is then galvanized, and thereafter, alloying is executed in heating. Thus, its plating wettability is improved, the alloying rates of various steel sheets with different alloying reaction rates are equalized, the industrial manufacture is facilitated and the alloying rates can be promoted particularly to the kinds of steel late in alloying reaction such as P-added steel.